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Note 7 - Leases & Property, Plant, Equipment and Water Programs (Details Textual)		9 Months Ended
	Feb. 29, 2016 USD ($) a	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Feb. 01, 2024 USD ($)
Operating Lease, Right-of-Use Asset		$ 3,485,000		$ 3,746,000
Depreciation		$ 909,000	$ 907,000
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)		13 years
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)		25 years
Northern Pipeline Agreement [Member]
Lessor, Operating Lease, Term of Contract (Year)					26 years
Operating Lease, Right-of-Use Asset					$ 1,900,000
Lessee, Operating Lease, Liability, to be Paid					4,800,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount					$ 2,900,000
Operating Lease, Weighted Average Discount Rate, Percent					10.00%
Operating Lease, Annual Rent Payments					$ 185,000
Fenner Valley Farms LLC Lease Agreement [Member]
Lessor, Operating Lease, Term of Contract (Year)	99 years
Area of Real Estate Property (Acre) | a	2,100
Long-term Debt, Total	$ 12,000,000
Lessor, Operating Lease, Payment to be Received, Year One		$ 420,000

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Area of a real estate property.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount of lessee's undiscounted obligation for lease payment for operating lease.

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Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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